Biological composite filler for treating livestock wastewater, preparation method and application of biological composite filler

Abstract

The invention discloses a biological composite filler for treating livestock wastewater, and a preparation method and application of the biological composite filler, and belongs to the field of treatment of livestock breeding wastewater. The preparation method comprises the following steps: (1) washing, air-drying and cutting wheat straws and soybean straws; (2) heating the mixed straws for pyrolysis; (3) preparing an (NH4)2HPO4 solution; (4) feeding the mixed straws into the (NH4)2HPO4 solution; (5) heating willow blocks for pyrolysis; (6) mixing the straws, wheat starch and wheat bran with stirring; (7) impregnating and drying biomass blocks; (8) compressing the biomass blocks into bulks to obtain the biological composite fillers by using a compressor. After the biological composite fillers are fed into the livestock wastewater, macromolecular nutrient elements such as phytate phosphorus, residual veterinary drugs, urea and suspended matters and metallic elements such as copper, iron and zinc in the wastewater can be greatly adsorbed, so that the problem of difficulty in the treatment of the livestock wastewater is effectively solved.

Description

technical field [0001] The invention belongs to the field of livestock and poultry breeding wastewater treatment; specifically, it relates to a biological composite filler for treating livestock and poultry wastewater and its preparation method and application, more specifically, it refers to the high ammonia nitrogen load of livestock and poultry breeding wastewater, and the water is not easy to discharge To reach the standard, there are many residual drugs and high treatment cost, and a biocomposite filler that can be treated to make it reach the standard is provided. Background technique [0002] In recent years, with the development of intensive aquaculture and large-scale aquaculture in our country, a large number of farms have appeared in rural areas. The wastewater discharged by these farms is large and concentrated every day, and the wastewater contains a large amount of pollutants, such as heavy metals, residual Veterinary drugs and a large number of pathogens have ...

AI Technical Summary

Problems solved by technology

[0008] In view of the fact that the existing livestock and poultry wastewater treatment cannot solve the problems of high metal content, nitrogen and phosphorus content and heavy odor during the treatment process, the present invention provides a biological composite filler for treating livestock and poultry wastewater and its preparation method and application. The biological composite filler has a porosity and The filler has high mechanical strength, and can absorb a large amount of phytate phosphorus, residual veterinary drugs (antibiotics), urea, suspended solids and other macromolecular nutrients in the wastewater after being put into livestock and poultry wastewater, as well as copper, iron, zinc and other metal elements, and the biofilm hangs The membrane performance is strong, and it also has a disinfection effect while adsorbing, and can kill pathogens in wastewater, effectively solving the problem of difficult livestock wastewater treatment